Notwithstanding other provisions of this chapter, during the period of their assignment to duty in South Carolina, members of the armed services of the United States stationed in South Carolina and their dependents are eligible for in-state rates. When such armed service personnel are ordered away from the State, their dependents are eligible for in-state tuition rates so long as they remain continuously enrolled at the state institution where they are enrolled at the time the assignment ends. These persons and their dependents are eligible for in-state rates after their discharge from the armed services even though they were not enrolled at a state institution at the time of their discharge, if they have evidenced an intent to establish domicile in South Carolina and if they have resided in South Carolina for a period of at least twelve months immediately preceding their discharge.